Top 250+ Solved Water and Wastewater Engineering MCQ Questions Answer
Q. Pick up the incorrect statement from the following. Intake of water supply should
a. Be nearer to the treatment plant
b. Receive water from purer zone of the source
c. Be located downstream of waste water disposal point
d. Remain easily accessible during floods
Q. The fire demand of a city may be worked out by
a. Kuichling's formula
b. Freeman formula
c. Under Writers formula
d. All the above
Q. The formula HL = n²V²L/R4/3 for the head loss in conduits is generally known as
a. Hazen-William's formula
b. Manning's formula
c. Darcy-Weisbach formula
d. Nikuradse formula
Q. The joint used for joining the plain ends of cast iron pipes, is
a. Flanged joint
b. Socket and spigot joint
c. Dresser coupling joint
d. Flexible joint
Q. Disinfection of water with ozone is not good because
a. It vanishes before water reaches the consumers
b. It removes the colour, taste and odour from water as bacterias
c. It adds taste to the water
d. It is more efficient than chlorine in killing bacterias
Q. The prescribed hardness limit of potable water ranges between
a. 50 to 75 P.P.M.
b. 75 to 115 P.P.M.
c. 100 to 150 P.P.M.
d. 150 to 200 P.P.M.
Q. While designing a water supply of an industrial township, industrial and commercial waterdemand of total supply, is assumed
a. 10 % (B) (C) (D)
b. 10 to 15 %
c. 15 to 20 %
d. 20 to 25 %
Q. After cleaning a slow sand filter, the filtered water is not used for
a. 6 hours to 12 hours
b. 12 hours to 18 hours
c. 18 hours to 24 hours
d. 24 hours to 36 hours
Q. The efficiency of sedimentation tank does not depend upon
a. Depth of tank
b. Length of tank
c. Detention period
d. Velocity of water
Q. Velocity of flow of water in plain sedimentation water tank, is normally kept
a. 3 cm/minute
b. 10 cm/minute
c. 20 cm/minute
d. 30 cm/minute
Q. The depth of the water table at a place is 45 m below the general ground level. To lift waterfrom a deep tube well in such a locality, the type of pump to be installed is
a. Centrifugal pump
b. Reciprocating pump
c. Deep well turbine pump
d. None of these
Q. In a well planned city, the layout of distribution pipes generally adopted, is
a. Grid-iron system
b. Interlaced system
c. Reticulation system
d. All the above
Q. Pick up the incorrect statement from the following:
a. Free surface ground water is subjected to atmospheric pressure
b. Water table surface rises and falls with seasons
c. Depth of water table is directly proportional to the rate of drawl of water
d. Level of water table remains stationary
Q. Pick up the incorrect statement from the following:
a. The flow in strainer type wells is radial (B) (C) (D)
b. The flow in cavity type wells in spherical
c. In strainer type wells, area of flow depends upon the length of the strainer pipe
d. In cavity type wells, area of flow depends upon the size of the cavity